# Proof Authentication vs Card Grading Tool

The clearest difference is review sentiment: Proof Authentication at 50% against Card Grading Tool's 0%. Proof Authentication also leads on ads (none vs shown) and monetization model (free vs ad-supported). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 8, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Proof Authentication | Card Grading Tool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (7 ratings)](https://appshunter.io/ios/app/proof-authentication/id1589988080/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | **50.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | **Free** | Ad-supported |
| Size | 76 MB | 108 MB |
| Requires iOS | **14.4** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Proof Authentication Corporation](https://appshunter.io/developer/1604240795) | [Computing & Dreams BVBA](https://appshunter.io/developer/1016296633) |

## What reviewers say

### Proof Authentication

[App page](https://appshunter.io/ios/app/proof-authentication/id1589988080)

Verify product authenticity instantly by scanning official security marks. Ensure your purchases are genuine with rapid and accurate authentication. Look for the Proof Security Mark on select consumer goods.

**Highlights:** Instant product authentication, Scan Official Proof Security Marks, High accuracy verification, Fast results, Supports selected consumer items

**In-app purchases:** none


### Card Grading Tool

[App page](https://appshunter.io/ios/app/card-grading-tool/id6739850958)

Analyze and measure the centering of your trading cards with precision tools. This app helps collectors determine grading potential and share results, supporting various card types.

**Highlights:** Accurate centering measurements, User-friendly interface, Customizable tools, Built-in ratio table, Save and share graded cards, Offline access

**In-app purchases:** none


## Frequently asked questions

### Is Proof Authentication free?

Proof Authentication is free to download, with no in-app purchases.

### Is Card Grading Tool free?

Card Grading Tool is free to download, with no in-app purchases.

### Do Proof Authentication or Card Grading Tool have ads?

Card Grading Tool shows ads; Proof Authentication does not.

### Which is updated more often, Proof Authentication or Card Grading Tool?

Proof Authentication ships an update every 2 months, and Card Grading Tool every 2 months. Most recently, Proof Authentication was updated on September 8, 2026 and Card Grading Tool on September 17, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*